On firearms built with numbers in the millions, Mosins...some Mauser models....I don't see any reason not to if needs it.
On less numerous models, I'd be reluctant.
I have a Swede M38 that I had to because the previous owner removed almost all of the finish. Thankfully they did an extremely good job of removing the finish so there was no damage to the wood and it looks great now. But I would have preferred the original...especially since were less than 70-80K of them made.
"And remember, Abraham Lincoln didn't die in vain, he died in Washington D.C." - Firesign Theatre